Abstract: To study the law of cutting tool consumption(CTC) in tunneling using the tunnel boring machine(TBM) in different strata and to address the issues for the applicability of quota CTC in the TBM construction budget for the Sichuan-Tibet railway tunnel, the variation law of CTC under various conditions, such as equivalent quartz content, uniaxial strength, and integrity, is analyzed according to the measured data from the TBM driving sites of the Hanjiang River-Weihe River water diversion project and Gaoligongshan tunnel. Then, the corresponding relationship between CTC and the Cerchar abrasiveness index(CAI) of rock abrasiveness is deduced. Further, the adjustment coefficients of CTC under different CAI values are verified, thereby providing a theoretical basis for the application of the CAI adjustment coefficient of rock abrasiveness in budget quota.

Key words: tunnel boring machine, law of cutting tool consumption, Cerchar abrasiveness index, boring machine cutter, quota adjustment coefficient